According to Professor Dunstan，this has as much to do with the fact that television is the most popular form of leisure as it does that our general lifestyles have changed.

　　“What has happened is that a lot of the normal activities of daily living that involved standing up and moving the muscles in the body have been converted to sitting，” he said.“Technological，social，and economic changes mean that people don’t move their muscles as much as they used to—consequently the levels of energy expenditure(消耗) as people go about their lives continue to shrink.”

　　So what should you do？Get moving！Find creative ways to keep mobile—bike instead of drive，do chores while watching TV，throw away the remote—and you’ll give yourself the best chance for a long and healthy life.

　　5．From the passage we know that one of the disadvantages of watching TV is that it

　　.

　　A．is a waste of time

　　B．has some junk information

　　C．does harm to one’s health

　　D．pollutes the environment

　　答案　C

　　解析　细节理解题。根据第一段第三句“研究者发现每天看电视一小时，死于心脏病的几率会增加1/5”可知，看电视对身体有害。

　　6．The underlined part “a sedentary lifestyle” in Paragraph 2 may mean a style in which one has to spend

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